[Elecraft] K2 and RTTY-settings ?

[Steve Holton]

>Over the weekend I successfully managed my first RTTY QSO's during BARTG
>RTTY Contest.
>I used MMTTY with standard setup (Mark 2115 Hz and Shift 170Hz)

You can also use lower frequencies for mark and space with MMTTY for example:
Mark 2000, 1700, 1445, 1275, 1170, 1000 all with shift 170
1000 and 1170 aren't recommended due to harmonic considerations, 2000 or 
1700 or possibly 1445 probably will bring you in range in all bands
This can avoid the problems you had with using reverse on some bands which 
forces your "listeners" to receive you reversed.

The MMTTY documentation makes this appear not to be possible, but it is if 
you set the "Ham Default" on:
Option (O) -> Setup MMTTY -> Demodulator   HAM Default  at bottom center of 
panel to a Mark freq and 170Hz spacing then you will xmit and recv. with 
the tones at that frequency in the audio passband.

This should   put the tones well within the range of your filters on all bands
It doesn't affect your "listeners" they can't tell where you set your tones 
as they see alternating "tones" 170Hz apart wherever they have their 
demodulator set. this is transparent, which SideBand you use isn't ...i.e. 
reversed or normal.
Most folks use LSB on all bands though USB has some history in Europe - I 
haven't seen a reversed signal in a contest for a long time.

See: http://www.rttyinfo.net/rtty_tutorial.htm


>With help of GRAM I tried to move my filters to 2200 Hz center frequency.
>- on 10 + 15m I could move the filters to 2200 Hz, on the lower bands it
>would not work (the range was too small)
>- then on the lower bands (20,  40, 80) I had to switch to "RTTY Rev" in
>oder to move my filters to 2200 Hz.
>
>Is this the way RTTY works on a K2 ?
>
>Due to the fact I had to run "RTTY Rev" I also had to reverse the mode on
>MMTTY.

You also then force your listeners to do the same not conducive to 
effective operation

>What filter bandwidth would you recommend ? Same steps as for CW ? Over the
>weekend my smallest filter was 1.6 kHz and sometimes I had inband QRM (as
>expected).
I use a wide filter for general listening and looking for signals and 
"focus" in with narrow filter like 250-350Hz especially with crowded band 
during contest.

There are some good resources on the web:
http://www.rttyinfo.net/
http://www.aa5au.com/rtty.html
And and active mailing list: http://lists.contesting.com/mailman/listinfo/rtty


>73 de Dominik, HB9CZF

BTW Thanks for the contact during the 'test at 17:36 on 15M ;<)


GL & 73
Steve Holton N1NB